Regenerative device, low-temperature pump and refrigerating machine

Abstract

The utility model discloses a regenerator, cryopump and refrigerator, including admission plug, regenerator casing, exhaust plug, said regenerator casing one end is fixedly connected with admission plug, the other end is detachably fixed with exhaust plug, admission plug, regenerator casing, exhaust plug fixed enclosure form the cavity, be equipped with internal packing. According to the utility model, through a detachable connection mode, the quantity, the weight, the type and the like of the filler in the regenerator can be simply adjusted, the regenerator does not need to be reprocessed, and the adjustment of the cooling capacity can be realized.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and more specifically to a cold storage device, a cryogenic pump, and a refrigeration machine. Background Technology

[0002] The regenerator (or heat accumulator) is a key component in a regenerative refrigeration unit, responsible for the periodic heat exchange between hot and cold fluids. It primarily exchanges heat with the working gas passing through the accumulator through internally packed regenerator material. During the charging phase, the heat of the working gas is transferred to the regenerator material, causing the working gas's own temperature to decrease. During the expansion and exhaust phases, the heat from the regenerator material is transferred back to the working gas, causing the working gas's own temperature to rise and return to the compressor. After several heat exchanges, a stable temperature gradient is formed axially within the accumulator, achieving stable heat exchange with the working gas.

[0003] See Figure 1 Conventional cold accumulators typically consist of an internally encapsulated cold storage material followed by a conventional exhaust plug 3. This exhaust plug 3 is usually bonded to the shell or secured with pins, and then the outer shape is precision machined. Once the structure of the cold accumulator's encapsulation plug is determined, its heat exchange efficiency and heat recovery loss are fixed, resulting in a constant cooling capacity of the chiller under specific operating conditions. Adjusting the chiller's cooling capacity within a certain range requires redesigning and remanufacturing the cold accumulator, and even redesigning and remanufacturing the cylinders—a cumbersome, time-consuming, and costly process. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to adjust the cooling capacity of the cold storage device.

[0005] This utility model solves the above-mentioned technical problems through the following technical means: a cold storage device, including an air inlet plug, a cold storage device shell, and an exhaust plug. The air inlet plug is fixedly connected to one end of the cold storage device shell, and the exhaust plug is detachably fixed to the other end. The cavity formed by the air inlet plug, the cold storage device shell, and the exhaust plug is filled with internal packing material.

[0006] As a preferred technical solution, the coolant accumulator shell and the exhaust plug are connected and fastened by connecting pins.

[0007] As a preferred technical solution, the exhaust plug is located in the inner cavity of the accumulator housing, the accumulator housing has a second pin connection hole adapted to the connecting pin, and the exhaust plug has a first pin connection hole adapted to the connecting pin.

[0008] As a preferred technical solution, a pad is provided inside the cavity, and a vent hole is provided on the pad.

[0009] As a preferred technical solution, the exhaust plug is provided with a direct current hole that communicates with the cavity.

[0010] As a preferred technical solution, the accumulator shell is provided with an exhaust port communicating with the cavity in the circumferential direction, and the air inlet plug is provided with an air inlet port communicating with the cavity.

[0011] As a preferred technical solution, the flow area of ​​the DC hole is 10%-30% of the sum of the flow areas of the exhaust holes.

[0012] As a preferred technical solution, the flow area of ​​the DC hole is 20%-30% or 10%-20% of the sum of the flow areas of the exhaust holes.

[0013] A refrigeration machine, comprising the aforementioned cold accumulator.

[0014] A cryogenic pump, comprising the aforementioned refrigeration unit.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) In this utility model, the quantity, weight and type of the packing inside the cold accumulator can be easily adjusted by the detachable connection method without reprocessing the cold accumulator, thus enabling the adjustment of the cooling capacity.

[0017] (2) In this utility model, by opening a DC hole on the exhaust plug and controlling the ratio of DC airflow and side airflow of the cold accumulator, the cooling capacity can be adjusted, realizing the simple adjustment of the cooling capacity of the refrigeration mechanism, shortening the product development and change cycle that requires adjustment of cooling capacity within a certain range, and also facilitating the later maintenance of the cold accumulator. Attached Figure Description

[0018] Figure 1 A schematic diagram of a cold accumulator structure is provided for the background art of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the cold accumulator provided in Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of the exhaust plug structure provided in Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting pin structure provided in Embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of the pad structure provided in Embodiment 1 of this utility model;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the pad provided in Embodiment 1 of this utility model;

[0024] Figure 7 This is a schematic diagram of the cross-sectional structure of the cold accumulator provided in Embodiment 2 of this utility model;

[0025] Figure 8 This is a schematic diagram of the exhaust plug structure provided in Embodiment 2 of this utility model;

[0026] Reference numerals: 1. Inlet plug; 2. Accumulator housing; 3. Conventional exhaust plug; 31. Exhaust plug; 32. First pin connection hole; 33. Direct current hole; 4. Connecting pin; 5. Internal packing; 6. Gasket; 61. Vent hole. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Example 1

[0029] See Figure 2 A cold accumulator includes an inlet plug 1, a cold accumulator shell 2, an exhaust plug 31, a connecting pin 4, internal filler 5, and a pad 6. One end of the cold accumulator shell 2 is fixedly connected to the inlet plug 1, and the other end is detachably fixed to the exhaust plug 31. A cavity structure is formed on the cold accumulator shell 2. One end of the cavity is sealed by the inlet plug 1, and the other end is sealed by the exhaust plug 31. The inlet plug 1 has an inlet hole communicating with the cavity. The cold accumulator shell 2 has an exhaust hole communicating with the cavity in its circumference. The working gas enters the inner cavity of the cold accumulator shell 2 through the inlet hole and flows out of the cavity through the exhaust hole. The axes of the inlet plug 1, the cold accumulator shell 2, and the exhaust plug 31 are coaxial.

[0030] The exhaust plug 31 is embedded in the cold storage housing 2. The exhaust plug 31 has a first pin connection hole 32 that penetrates the exhaust plug 31 in a direction perpendicular to the axial direction of the cold storage housing 2. The cold storage housing 2 has a second pin connection hole that corresponds to the first pin connection hole 32 of the exhaust plug 31. The connecting pin 4 can pass through the second pin connection hole and the first pin connection hole 32 to fix the exhaust plug 31 to the cold storage housing 2.

[0031] Removing the connecting pin 4 allows the exhaust plug 31 to be removed, and the internal packing 5 filling the cavity of the accumulator housing 2 can be adjusted. The quantity or type of internal packing 5 can be readjusted according to the designed cooling capacity. Specific adjustment methods include adjusting the quantity of stainless steel or phosphor bronze wire mesh, adjusting the weight of the packing particles, or adjusting the type of packing. When a reduction in cooling capacity is required, after reducing the quantity or weight of the internal packing 5, a new packing material can be installed in the filling section at the hot end (inlet end) of the accumulator housing, matching the accumulator housing's specifications. 2. A pad 6 made of the same material as the exhaust plug 31 or the intake plug 1. The thickness of the pad 6 is designed according to the target cooling capacity. The pad 6 is machined with multiple vent holes 61. In this embodiment, the diameter of the vent holes 61 is half the diameter of the intake hole. The number of vent holes is set so as not to affect the internal flow resistance of the cold accumulator, so as to prevent excessive number from causing unplanned cooling capacity reduction. When it is necessary to increase the cooling capacity, it is not necessary to add pad 6. It is only necessary to adjust the type or mesh number of the internal packing 5 to meet the cooling capacity design in the required temperature range.

[0032] Example 2

[0033] The difference between this embodiment and embodiment 1 is that a direct flow hole 33 is opened on the exhaust plug 31, and the size of the opening is in a certain proportion to the total flow area of ​​the original exhaust holes, so as to meet the adjustment requirements of the cooling capacity. In this embodiment, the flow area of ​​the direct flow hole 33 is 10%-30% of the sum of the flow areas of the original exhaust holes. The ratio of the direct flow air volume and the side flow air volume of the cold storage is controlled by this ratio to achieve the purpose of adjusting the cooling capacity.

[0034] The direct current hole 33 connects the cavity to the outside. When the cooling capacity needs to be reduced, the total area of ​​the opening should be 20%-30% of the sum of the original exhaust hole flow areas. The specific ratio needs to be designed according to the size of the cold accumulator and the target cooling capacity. The cooling capacity is reduced through the direct current effect of the cold accumulator. This direct current effect refers to the gas flowing directly into the cold end through the direct current hole 33 on the exhaust plug 31, which will cause pressure fluctuations in the cold end gas and affect the heat exchange between the gas and the heat exchanger. When the cooling capacity needs to be increased, the total area of ​​the opening of the direct current hole 33 should be 10%-20% of the sum of the original exhaust hole flow areas. The specific ratio can be designed according to the size of the cold accumulator and the target cooling capacity. Since the airflow through this single or several small holes has low flow resistance and high pressure, it can generate a higher cooling capacity after the cold cavity expands. In this embodiment, the internal packing 5 inside the cold accumulator shell 2 does not need to be adjusted; it can be accomplished simply by opening a hole in the exhaust plug 31 or replacing the exhaust plug 31 with an opening.

[0035] Example 3

[0036] The difference between this embodiment and embodiment 1 is that, based on embodiment 1, a direct current hole 33 is opened on the exhaust plug 31, and the size of the hole is in a certain proportion to the total flow area of ​​the original exhaust hole.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cold storage device, characterized in that, It includes an air inlet plug, a cold accumulator housing, and an exhaust plug. The air inlet plug is fixedly connected to one end of the cold accumulator housing, and the exhaust plug is detachably fixed to the other end. The cavity formed by the air inlet plug, the cold accumulator housing, and the exhaust plug is filled with internal packing.

2. A cold storage device according to claim 1, characterized in that, The coolant accumulator housing and the exhaust plug are connected and fastened by connecting pins.

3. A cold storage device according to claim 2, characterized in that, The exhaust plug is located inside the cold storage housing. The cold storage housing has a second pin connection hole that matches the connecting pin, and the exhaust plug has a first pin connection hole that matches the connecting pin.

4. A cold storage device according to claim 1, characterized in that, The cavity is equipped with a pad, and the pad has ventilation holes.

5. A cold storage device according to claim 1, characterized in that, The exhaust plug has a direct current hole that communicates with the cavity.

6. A cold storage device according to claim 5, characterized in that, The accumulator housing has an exhaust port that communicates with the cavity in the circumferential direction, and the air inlet plug has an air inlet port that communicates with the cavity.

7. A cold storage device according to claim 6, characterized in that, The flow area of ​​the direct current hole is 10%-30% of the sum of the flow areas of the exhaust holes.

8. A cold storage device according to claim 7, characterized in that, The flow area of ​​the DC hole is 20%-30% or 10%-20% of the sum of the flow areas of the exhaust holes.

9. A refrigeration machine, characterized in that, Includes the cold storage device as described in any one of claims 1-8.

10. A cryogenic pump, characterized in that, Includes the refrigeration machine as described in claim 9.

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